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<td ><a href="../qtdoc/index.html">Qt 5.14</a></td><td ><a href="qtgui-index.html">Qt GUI</a></td><td ><a href="qtgui-module.html">C++ Classes</a></td><td >QActionEvent</td></tr></table><table class="buildversion"><tr>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QActionEvent Class</h1>
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<p>The QActionEvent class provides an event that is generated when a <a href="../qtwidgets/qaction.html">QAction</a> is added, removed, or changed. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QActionEvent&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += gui</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="../qtcore/qevent.html">QEvent</a></td></tr></table></div><ul>
<li><a href="qactionevent-members.html">List of all members, including inherited members</a></li>
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<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qactionevent.html#QActionEvent">QActionEvent</a></b>(int <i>type</i>, QAction *<i>action</i>, QAction *<i>before</i> = nullptr)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QAction *</td><td class="memItemRight bottomAlign"><b><a href="qactionevent.html#action">action</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QAction *</td><td class="memItemRight bottomAlign"><b><a href="qactionevent.html#before">before</a></b>() const</td></tr>
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<h2 id="details">Detailed Description</h2>
<p>Actions can be added to widgets using <a href="../qtwidgets/qwidget.html#addAction">QWidget::addAction</a>(). This generates an <a href="../qtcore/qevent.html#Type-enum">ActionAdded</a> event, which you can handle to provide custom behavior. For example, <a href="../qtwidgets/qtoolbar.html">QToolBar</a> reimplements <a href="../qtwidgets/qwidget.html#actionEvent">QWidget::actionEvent</a>() to create <a href="../qtwidgets/qtoolbutton.html">QToolButton</a>s for the actions.</p>
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<p><b>See also </b><a href="../qtwidgets/qaction.html">QAction</a>, <a href="../qtwidgets/qwidget.html#addAction">QWidget::addAction</a>(), <a href="../qtwidgets/qwidget.html#removeAction">QWidget::removeAction</a>(), and <a href="../qtwidgets/qwidget.html#actions">QWidget::actions</a>().</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="QActionEvent"><a name="QActionEvent"></a>QActionEvent::<span class="name">QActionEvent</span>(<span class="type">int</span> <i>type</i>, <span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span> *<i>action</i>, <span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span> *<i>before</i> = nullptr)</h3>
<p>Constructs an action event. The <i>type</i> can be <a href="../qtcore/qevent.html#Type-enum">ActionChanged</a>, <a href="../qtcore/qevent.html#Type-enum">ActionAdded</a>, or <a href="../qtcore/qevent.html#Type-enum">ActionRemoved</a>.</p>
<p><i>action</i> is the action that is changed, added, or removed. If <i>type</i> is <a href="../qtcore/qevent.html#Type-enum">ActionAdded</a>, the action is to be inserted before the action <i>before</i>. If <i>before</i> is 0, the action is appended.</p>
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<h3 class="fn" id="action"><a name="action"></a><span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span> *QActionEvent::<span class="name">action</span>() const</h3>
<p>Returns the action that is changed, added, or removed.</p>
<p><b>See also </b><a href="qactionevent.html#before">before</a>().</p>
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<h3 class="fn" id="before"><a name="before"></a><span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span> *QActionEvent::<span class="name">before</span>() const</h3>
<p>If <a href="../qtcore/qevent.html#type">type</a>() is <a href="../qtcore/qevent.html#Type-enum">ActionAdded</a>, returns the action that should appear before <a href="qactionevent.html#action">action</a>(). If this function returns <code>nullptr</code>, the action should be appended to already existing actions on the same widget.</p>
<p><b>See also </b><a href="qactionevent.html#action">action</a>() and <a href="../qtwidgets/qwidget.html#actions">QWidget::actions</a>().</p>
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